sky fox flew over the scene at the virginia credit union on gordon shelton boulevard. someone called to report an explosion overnight. security video confirmed an explosive device went off around 4 a.m. it scorched and damaged the atm, but it still functions. police evacuated the bank and nearby homes this afternoon after a dog detected a possible second device behind the bank. it was nothing. they gave the all clear a short time later. >>> another big story tonight, a 34-year-old manslaughter dead, his 34-year-old brother -- man is decked his 34-year- old brother hurt after -- dead, his 34-year-old brother hurt after apparently they were intentionally run over this morning in gaithersburg. >> reporter: just after 1:17 a.m. this morning police found one of the brothers unconscious on the grass next to a sign for the avalon school. video of the scene shows paramedics working on the man several minutes, but never regained consciousness. when police spoke with the man's brother, he told them this. >> he related to us that he and his brother had been in a black honda civic